DirecTV cannot tell geographically where a particular IRD/STB is physically located. So if you move it to another address there is no way to tell unless you call them and let them know. However if you bring the IRD/STB outside your market, you may lose the locals based on the physical address you reported to DirecTV. DirecTV bases you locals on the physical address/installation address on your account. You don't get locals based on where the IRD/STB is geographically/physically located, but based on what you report to DirecTV.
For example, lets say you are planning a move from Michigan to Florida, and you call DirecTV a week early to report the new address. If the CSR changes the physical address to Florida while you are on the phone, you will instantly get the Florida locals in Michigan. The DirecTV movers connection will install a new dish at the new address and once you arrive in Florida, you should just need to connect the IRD/STB's yourself or on the appointment date have DirecTV movers connection tech do it.
A phone line is not required to be attached to an IRD/STB as some report, and yes you can still order PPV via internet (for all IRD/STB's on your account to get the PPV) or by remote to just that one IRD/STB. I don't use a phone line, I use cellular for home service. My service works fine without the phone line, and I have 2 HR20-700S units, and yes I can order PPV through the remote without the phone line.